this post was submitted on 07 Jul 2025
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Orrrr they have a u8 chat_participant_id of some kind and a binary data format for message passing. The GROUP_CHAT_LIMIT const may have a bigger data type, but they may very well be trying to conserve 3 bytes per message. Ids can easily start at 0.
150 gigs of bandwidth saved per day doesn't seem like a whole lot at their scale, but if they archive all the metadata, that's over 50 terabytes a year saved on storage - multiplied by how many copies they have of their data. Still not a lot tbh, but if they also conserve data in every other place they can, they could be saving petabytes per year in storage.
Still weird because then they'd have to reuse ids when people leave, otherwise you could join and leave 255 times to disable a group lol